Operating mechanism for rotary switch

Abstract

The utility model provides an operating mechanism for rotary switch, mainly solves the problem that the current rotary switch needs to set manually reset button to open. Its characterized in be equipped with transmission shaft (3) by the knob drive rotation in the base, ratchet wheel (4) is connected with transmission shaft and is driven to rotate by transmission shaft, locking plate (5) is equipped with pawl (51) with ratchet wheel cooperation on locking plate, is used for locking after the rotation of knob to position, first reset part (6) is contacted with locking plate cooperation and provides the pawl drive ratchet wheel force, unlocking part (7) is used for when switch opening by manual opening mechanism or electric opening mechanism drive through pushing locking plate and makes pawl leave ratchet wheel to realize unlocking. The utility model provides an operating mechanism for rotary switch, the operating mechanism does not need to set manually reset button, directly rotates handle to reset tripping mechanism, and the operating mechanism is compact safe simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of rotary switches, and more specifically to operating mechanisms for rotary switches. Background Technology

[0002] A rotary switch is a type of switch that uses a rotating handle to control the opening and closing of the main contacts. Rotary switches come in two structural forms: single-pole single-position and multi-pole multi-position. Single-pole single-position rotary switches are often used in conjunction with shaft-type potentiometers, while multi-pole multi-position rotary switches are primarily used for switching operating states of circuits.

[0003] In rotary switches that use a ratchet and tooth structure for positioning, resetting the rotary switch requires pressing the clutch mechanism to separate the ratchet and tooth; it cannot be directly reversed to cut off the circuit. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an operating mechanism for a rotary switch, which mainly solves the problem that current rotary switches require an additional manual reset button to open the circuit.

[0005] The technical solution adopted in this invention is:

[0006] The rotary switch operating mechanism includes a base and a knob, wherein the base is provided with

[0007] The drive shaft is rotated by the knob;

[0008] The ratchet is connected to the drive shaft and is driven to rotate by the drive shaft.

[0009] The locking plate has a pawl that engages with the ratchet, which is used to lock the knob when it is turned to the correct position.

[0010] The first reset element, in conjunction with the locking plate, provides a force to drive the pawl into contact with the ratchet.

[0011] The unlocking mechanism is used to unlock the switch by pushing the locking plate and disengaging the pawl from the ratchet when the switch is disconnected, driven by a manual or electric tripping mechanism.

[0012] The manual tripping mechanism includes a push part, a neutral part, and a drive part disposed on the knob; the push part is used to drive the transmission shaft to rotate; when the knob reverse switch is off, the neutral part cooperates with the transmission shaft and the drive part drives the unlocking member to rotate, thereby driving the locking plate to rotate through the unlocking member to achieve unlocking.

[0013] The base is also provided with a second reset member, which is used to provide the ratchet with a reset force.

[0014] The drive shaft includes an input shaft and an output shaft. The output shaft is provided with a groove for mounting the input shaft. The circumferential wall of the input shaft is provided with a first surface for transmitting torque when the knob is turned clockwise and a second surface for transmitting torque when the knob is turned counterclockwise. The first surface contacts the inner wall of the groove, and there is a gap between the second surface and the inner wall of the groove.

[0015] The neutral part is an arc-shaped groove provided on the knob, the pushing part is a pushing surface provided in the arc-shaped groove, and the transmission shaft has a boss provided in the arc-shaped groove on its circumferential outer wall.

[0016] The unlocking component includes a base plate, the front end of which is provided with a top for pressing against the locking component, and a support column is also provided on the base plate. The support column is provided with transmission teeth, and the driving part is a driving tooth that meshes with the transmission teeth.

[0017] The knob has a guide plate inside, the drive teeth are disposed on the guide plate, the guide plate has a locking pin, the base has a support for the support column to pass through, and the support has a groove for the locking pin to engage when the switch is closed.

[0018] The first reset element is a first torsion spring, one of the torsion legs of the first torsion spring abuts against the locking plate and drives the locking plate to rotate in the direction of engaging with the ratchet.

[0019] The second reset element is a second torsion spring. The ratchet is provided with a hanging plate. One torsion foot of the second torsion spring contacts the hanging plate to provide a force for the ratchet to rotate in the direction of switch disconnection.

[0020] The electric tripping mechanism is an electromagnet, which includes a push rod, one end of which is positioned opposite to the unlocking component.

[0021] The beneficial effects of the present invention are: the present invention provides an operating mechanism for a rotary switch, which does not require a separate manual reset button, and the tripping mechanism can be reset by simply rotating the handle. The operating mechanism is compact, safe and simple in structure. Attached Figure Description

[0022] Figure 1 This is a perspective view of an embodiment of the present invention.

[0023] Figure 2 This is an internal perspective view of another embodiment of the present invention.

[0024] Figure 3 This is a perspective view of a knob according to an embodiment of the present invention.

[0025] Figure 4 This is an exploded view of a drive shaft according to an embodiment of the present invention.

[0026] Figure 5 This is a partial cross-sectional schematic diagram of a drive shaft according to an embodiment of the present invention.

[0027] Figure 6 This is a partial perspective view of a drive shaft according to an embodiment of the present invention.

[0028] Figure 7 This is a partial cross-sectional schematic diagram of a drive shaft according to an embodiment of the present invention.

[0029] Figure 8 This is a partial perspective view of a drive shaft according to an embodiment of the present invention. Detailed Implementation

[0030] The invention will be further described below with reference to the accompanying drawings: As shown in the figures, the rotary switch operating mechanism includes a base 1 and a knob 2. The base is provided with a transmission shaft 3, which is driven to rotate by the knob; a ratchet 4 is connected to the transmission shaft and is driven to rotate by the transmission shaft; a locking plate 5 is provided with a pawl 51 that cooperates with the ratchet, which is used to lock the knob after it is rotated to the correct position; a first reset member 6 cooperates with the locking plate to provide a force that drives the pawl to contact the ratchet; and an unlocking member 7 is used to unlock the switch when it is disconnected by a manual or electric tripping mechanism by pushing the locking plate and causing the pawl to leave the ratchet. The operating principle of this rotary switch is as follows: When the knob rotates forward, it drives the drive shaft to rotate, which in turn drives the ratchet to rotate (or via key transmission, etc.). At this time, the locking plate, under the action of the first reset element, engages with the ratchet in one direction. When it is necessary to open the circuit, there are two situations: When operating manually, the knob is reversed, and the manual opening mechanism drives the unlocking element to rotate. The unlocking element drives the locking plate to rotate, and the locking plate overcomes the elastic force of the first reset element, causing its pawl to disengage from the ratchet, thus unlocking the ratchet. Preferably, a second reset element provides the force to reverse the ratchet, which in turn drives the drive shaft to rotate simultaneously, achieving the function of disconnection. When operating electrically, an electromagnet can be used. When disconnection is required, the top of the electromagnet extends and pushes the unlocking element to rotate, which drives the locking plate to rotate. The locking plate overcomes the elastic force of the first reset element, causing its pawl to disengage from the ratchet, thus unlocking the ratchet. Preferably, a second reset element provides the force to reverse the ratchet, which in turn drives the drive shaft to rotate simultaneously, achieving the function of disconnection. When the mechanism performs a closing operation, the input shaft synchronously drives the output shaft (the switch jumps when the knob has not reached the indicated ON position), closing and locking the circuit. The input shaft does not interfere with the accelerated movement of the output shaft caused by the switch jumping. When the mechanism performs a opening operation, the knob reaches the indicated ON position, triggering the ratchet mechanism to rotate the output shaft. The switch jumps before the output shaft has rotated 90 degrees.

[0031] In this embodiment, as shown in the figure, the manual tripping mechanism includes a pushing part 21, a neutral part 22, and a driving part 23 disposed on the knob 2. The pushing part is used to drive the transmission shaft to rotate. When the knob reverse switch is off, the neutral part cooperates with the transmission shaft, and the driving part drives the unlocking member to rotate, thereby driving the locking plate to rotate and unlocking. When reversing, the knob will rotate a certain angle through the neutral part, at which time it does not drive the transmission shaft to rotate. Then the driving part drives the unlocking member to rotate. However, the knob no longer drives the transmission shaft synchronously, and is not affected by the ratchet and pawl locking and thus cannot reverse.

[0032] In this embodiment, as shown in the figure, a second reset member 61 is also provided inside the base. The second reset member is used to provide a force for resetting the ratchet. This second reset member can be a torsion spring, which stores energy during forward rotation and releases the reset force during unlocking.

[0033] In this embodiment, as shown in the figure, the transmission shaft includes an input shaft 31 and an output shaft 32. The output shaft has a recess 321 for mounting the input shaft. The circumferential wall of the input shaft has a first surface 311 for transmitting torque when the knob rotates forward and a second surface 312 for transmitting torque when rotating in reverse. The first surface contacts the inner wall of the recess, and there is a gap 313 between the second surface and the inner wall of the recess. When rotating forward, the input shaft and the output shaft rotate synchronously. When rotating in reverse, due to the gap, the input shaft needs to rotate a certain position to drive the output shaft to rotate, reducing the possibility of reverse jamming caused by machining precision. The input shaft is rotatably mounted on the knob, and the output shaft can be mounted on the base. The gap between the input shaft and the output shaft is to avoid interference between the input shaft and the output shaft when the switch trips, so as to make the switch trip quickly and cleanly, and minimize the generation and duration of electric arc.

[0034] In this embodiment, as shown in the figure, the neutral part is an arc-shaped groove on the knob, the pushing part is a pushing surface inside the arc-shaped groove, and the circumferential outer wall of the transmission shaft has a boss 30 located inside the arc-shaped groove. When rotating in reverse, the knob rotates at a certain angle and does not transmit torque. However, when rotating forward, the pushing surface inside the arc-shaped groove can drive the boss, thereby driving the transmission shaft to rotate.

[0035] In this embodiment, as shown in the figure, the unlocking component includes a base plate 71. The front end of the base plate has a top 711 for pressing against the locking component. The base plate also has a support column 712, on which a transmission gear 713 is provided. The driving part is a drive gear that meshes with the transmission gear. When reversing, the unlocking component rotates via the drive gear and the transmission gear, thereby unlocking the locking plate by rotating it. The reset of the unlocking component can be achieved using a separate torsion spring or the torsion spring of the locking plate. Because the rotation angle of the locking plate is actually very small, the locking plate and the unlocking component can even remain in contact from beginning to end. Therefore, a stable reset can be achieved using the first reset component.

[0036] In this embodiment, as shown in the figure, the knob is provided with a guide plate 25, the drive teeth are provided on the guide plate, the guide plate is provided with a locking pin 251, and the base is provided with a support 11 for the support column to pass through. The support is provided with a slot 111 for the locking pin to engage when the switch is closed. When the switch is closed, it plays a certain role in locking the knob, preventing the knob from rotating arbitrarily, and the force will not affect the electric tripping.

[0037] In this embodiment, as shown in the figure, the first reset element is a first torsion spring. One torsion leg of the first torsion spring presses against the locking plate and drives the locking plate to rotate in the direction of engagement with the ratchet. This provides a force for the pawl to maintain contact with the ratchet.

[0038] In this embodiment, as shown in the figure, the second reset element is a second torsion spring. A mounting plate 41 is provided on the ratchet. One torsion foot 611 of the second torsion spring contacts the mounting plate, providing a force to rotate the ratchet in the switch-off direction. This provides a force for rapid switch-off after the ratchet pawl breaks.

[0039] In this embodiment, as shown in the figure, the electric tripping mechanism is an electromagnet 8, which includes a push rod 81, one end of which is disposed opposite to the unlocking component.

[0040] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. The embodiments should not be considered as limiting the invention, but any improvements made based on the spirit of the invention should be within the scope of protection of the invention.

Claims

1. An operating mechanism for a rotary switch, comprising a base (1) and a knob (2), characterized in that: The base is provided with The drive shaft (3) is driven to rotate by the knob; The ratchet (4) is connected to the drive shaft and is driven to rotate by the drive shaft; Locking plate (5), the locking plate is provided with a pawl (51) that cooperates with the ratchet, used to lock after the knob is turned into place; The first reset element (6), in cooperation with the locking plate, provides a force to drive the pawl into contact with the ratchet. The unlocking component (7) is used to unlock the switch by pushing the locking plate and disengaging the pawl from the ratchet when the switch is disconnected, driven by a manual or electric tripping mechanism. The manual tripping mechanism includes a push part (21), a neutral part (22), and a drive part (23) provided on the knob (2). The neutral part is an arc-shaped groove provided on the knob. The push part is a push surface provided in the arc-shaped groove. The outer wall of the transmission shaft is provided with a boss (30) provided in the arc-shaped groove. The push part is used to drive the transmission shaft to rotate. When the knob reverse switch is off, it cooperates with the transmission shaft through the neutral part and the drive part drives the unlocking member to rotate. The unlocking member drives the locking plate to rotate to achieve unlocking. When the knob reverse switch is off, it cooperates with the transmission shaft through the neutral part to reverse. The knob will rotate a certain angle through the neutral part. At this time, it does not drive the transmission shaft to rotate. Then the drive part drives the unlocking member to rotate. The drive shaft includes an input shaft (31) and an output shaft (32). The output shaft is provided with a recess (321) for mounting the input shaft. The circumferential wall of the input shaft is provided with a first surface (311) for transmitting torque when the knob is turned clockwise and a second surface (312) for transmitting torque when the knob is turned counterclockwise. The first surface is in contact with the inner wall of the recess, and there is a gap (313) between the second surface and the inner wall of the recess.

2. The operating mechanism for a rotary switch according to claim 1, characterized in that: The base is also provided with a second reset member (61), which is used to provide the ratchet reset force.

3. The operating mechanism for a rotary switch according to claim 2, characterized in that: The unlocking component includes a base plate (71), the front end of which is provided with a top head (711) for pressing against the locking component, and a support column (712) is also provided on the base plate. The support column is provided with a transmission tooth (713), and the driving part is a driving tooth that meshes with the transmission tooth.

4. The operating mechanism for a rotary switch according to claim 3, characterized in that: The knob is provided with a guide plate (25), the drive teeth are provided on the guide plate, the guide plate is provided with a locking pin (251), the base is provided with a support (11) for the support column to pass through, and the support is provided with a slot (111) for the locking pin to engage when the switch is closed.

5. The operating mechanism for a rotary switch according to claim 4, characterized in that: The first reset element is a first torsion spring, one of the torsion legs of the first torsion spring abuts against the locking plate and drives the locking plate to rotate in the direction of engaging with the ratchet.

6. The operating mechanism for a rotary switch according to claim 5, characterized in that: The second reset element is a second torsion spring. The ratchet is provided with a hanging plate (41). One torsion foot (611) of the second torsion spring contacts the hanging plate to provide a force for the ratchet to rotate in the direction of switch disconnection.

7. The operating mechanism for a rotary switch according to claim 1, characterized in that: The electric tripping mechanism is an electromagnet (8), which includes a push rod (81), one end of which is positioned opposite to the unlocking component.

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